Q. 7‑6 during the first set. How did you manage to turn the whole game around?

JUAN MARTIN DEL POTRO: Well, I knew from the outset that I could win this match, I could break him. I knew that.

I was always at almost, you know, something like 30‑40, so I had enough confidence to continue. I knew that I could change the situation at any moment.

Q. We're all a bit worried about your knee. How do you feel?

JUAN MARTIN DEL POTRO: Well, yes, this is something that bothers me. This is true. It's a constant bother. So what I try and do is not to think about it. I try and do my best with my tennis. And when I'm out there on the court I try not to think too much about the fact that it really bothers me.

So today and tomorrow I'll continue with my treatment and the necessary practice, what I usually do. I want to be ready when I'm on the courts.

Q. So you've talked about your knee, and your knee is something that really bothers you on the right‑hand side mainly when you're serving?

JUAN MARTIN DEL POTRO: Yes. This is an injury that really bothers me when I'm trying to find the right stance when I'm serving. You know, if you're not strong enough on your legs, it's difficult for you to play some shots more than others, by the way. This is something difficult to manage.

But I try not to think about it at all. What's important for me is to be right there on the courts, to be aggressive, offensive all the time, even though, as I said, it bothers me so that I can dictate the game so that it wouldn't be even worse.
Q. Did you feel a little better or would you say that it has worsened?

JUAN MARTIN DEL POTRO: No, it has not worsened. The trend is rather positive.

Q. What about your next match?

JUAN MARTIN DEL POTRO: I don't know who I'm going to play against.

Q. Cilic.

JUAN MARTIN DEL POTRO: Oh, yes, we know one another well, very well. The matches we play are always very difficult matches. The way he plays tennis is similar to my way of playing tennis.

He's really an attacker. He's really someone who serves well. He's dangerous. I think that now 32 players are out, and they're excellent players, and they could all play a major tournament, and Cilic has a lot of potential. He really is an excellent player. It's going to be tough.

Q. Today you had a high percentage of winning shots. So my question is: Was this your strategy? That is, did you intend to win the game as quickly as possible?

JUAN MARTIN DEL POTRO: Well, of course I wanted to shorten the rallies as much as I could. I wanted to win these points as quickly as I could.

There was a moment when, you know, I managed to do this and to stick to my strategy, that is, to shorten the rallies, not to move around too much, not to run too much, and not to feel endangered.

Q. Seen from outside, he was a solid player, wouldn't you say so? And he had dropshots. You had to move around to catch those.

JUAN MARTIN DEL POTRO: Yeah, certainly. Well, this opponent, the next opponent, is going to be really tough. His backhand along the lines is really tricky. He's a player who can play all types of shots. He's very homogenous as well, and I knew that he would be lower at a moment during the match, so I had to continue so as to win the match.

Q. Maybe there's another difficulty, which is that you were playing on Court No. 2. You slide more.

JUAN MARTIN DEL POTRO: No, all courts here are good. Court No. 2 is okay. You're close to the audience, to the crowd, which is something very pleasant. I think all courts look alike here except for central court, of course.

The other courts are smaller behind the baseline. I like Court No. 2, by the way.